Project Hurunui Wind Construction and Project Overview

Project Hurunui Wind Construction Effects and Management Report
Concrete
Component
Estimated Demand
(Turbine
Foundations)
Estimated
Demand Per
Pour (Same
Day)
Approximate
Indication of Average
Demand
Cement 3,200 tonnes 94 tonnes 3 x 23 tonne bulk
carriers per day
Sand and
Aggregate
27,000 tonnes 800 tonnes 13 x 23 tonne trucks
per day
Water 2.4 million litres 72,000 7 tankers (10,000 litre
capacity) per day
Table 11: Indicative Batching Plant Demand on Materials
We envisage that measures to contain any dust, spillage and wash down of plant or trucks
will be outlined in the contractor’s management plan. Such measures are likely to include
cement storage within a silo, aggregate storage bins, a temporary concrete slab beneath
the loading area and containment bunding around the plant.
3.2.7 Borrow Areas
Basecourse material may be sourced within the project area from excavations for the
access roads, working platforms and foundations wherever practicable. Basecourse
material may also be sourced from borrow areas within the site. However, an appraisal on
the availability of suitable material on-site for processing roading and platform basecourse
would be undertaken at the detailed design phase to determine whether suitable material is
available on site.
In the event that locally won materials will be suitable for road construction, borrow areas
would be established at locations within the site which meet the same criteria established
for fill sites (outlined in Section 2.4). Extracted materials will be stockpiled at localised
processing areas where a mobile crushing plant will be used to produce the required grade
of basecourse material. Material may also be extracted from these borrow areas for
roading fill where there is a shortfall of suitable material excavated from road construction.
The total pessimistic volume of basecourse required for roads, turbine platforms and
laydown areas is approximately 41,000m 3 . Assuming this involves approximately 90% of
the equivalent volume in overburden to extract this material and an average borrow site
depth of approximately 3m the following construction footprint expected is approximately
25,000m 2 . These details are summarised in Table 12 below.
Total Volume of
Basecourse (m 3 )
Equivalent Volume
of Overburden (m 3 )
Total Combined
Volume (m 3 )
Construction
Footprint (m 2 )
41,000 35,000 76,000 25,000
5C-1604.02
February 2011 32